Tetrahedral turbine block



FIG. 1 is a perspective view of a tetrahedral turbine block, showing ournew design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a back elevation view thereof;

FIG. 6 is a left side elevation view thereof; and,

FIG. 7 is a right side elevation view thereof.

The shading shown is indicative of surface contour and not surfaceornamentation.

CLAIM The ornamental design for a tetrahedral turbine block, as shownand described.